Stanley 66-172-A Slotted Screwdriver 3/8 in Square Shank

Product Description

The STANLEY 66-172-A is a heavy-duty slotted screwdriver built for professional tradespeople who need reach and torque on standard slotted fasteners. The blade measures 12 inches in length with a 3/8-inch tip width, and the tool stretches to an overall length of 17.25 inches — giving it the leverage needed for deep-set or hard-to-reach fasteners. The square shank design allows a wrench to be applied directly to the shank for added turning force on stubborn screws. The acetate handle provides a firm, durable grip. Electricians, HVAC techs, plumbers, and general maintenance professionals will find this tool useful for panel work, equipment access, and fixture installation.

This screwdriver is suited for residential and commercial service applications where a longer-reach slotted driver is required. The 12-inch blade makes it effective in junction boxes, deep equipment enclosures, or any location where a standard-length driver cannot access the fastener. The square shank and acetate handle combination is a traditional professional-grade configuration commonly stocked in field service kits and shop toolboxes alike.

Key Features

• 3/8-inch blade tip width for standard slotted fasteners
• 12-inch blade length provides extended reach in tight or deep installations
• 17.25-inch overall length for maximum leverage on stubborn fasteners
• Square shank accepts a wrench for extra torque when needed
• Acetate handle offers a durable, firm grip during use
• Standard slotted tip type compatible with common slotted screw heads

Compatibility

Designed as a standard slotted screwdriver for use with conventional slotted fasteners across HVAC, plumbing, electrical, and general mechanical service applications.

Installation Notes

This tool is used by licensed tradespeople and maintenance professionals across multiple disciplines. Always de-energize electrical equipment before using any screwdriver in or near live panels or terminals, following NEC lockout/tagout procedures. Inspect the blade tip for wear or rounding before use, as a damaged tip can slip and damage fasteners or cause injury. The square shank allows wrench engagement — use this feature only when the fastener requires additional torque beyond hand force.